Concession advice needed.

Concession advice needed.

Hello, I read the site often but this is my first post. I am thinking hard about buying a 6x10 concession trailer.However when I looked at pictures of concession stands at some of the local festivals where I plan to set up, they have some really nice and large trailers. Will I be able to make decent money with a smaller plain trailer? Thanks and I really look forward to your advice.